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    Trade effects of regional integration in imperfect competition: evidence from the greater arab free trade area (GAFTA)

    , Article International Economic Journal ; Vol. 28, issue. 2 , Jun , 2014 , p. 273-292 ; ISSN: 10168737 Peridy, N ; Abedini, J ; Sharif University of Technology
    This article aims to provide new insights into trade effects of the Greater Arab Free Trade Area (GAFTA), using an imperfect competition framework. The model combines the new gravity model approach with supply-demand export equations in imperfect competition. In this regard, the role of scale economies, product varieties and expectations is explored. Facing the lack of international data on scale economies, we also develop a translog production system which makes it possible to obtain reliable estimates of this factor. For a more rigorous treatment of the endogeneity problem in the model, we make use of an instrumental GMM panel estimator. Results show limited effects of GAFTA on regional... 

    Relationship of profitability of world’s top companies with entrepreneurship, competitiveness, and business environment indicators

    , Article Applied Economics ; Volume 53, Issue 23 , December , 2020 , Pages 2584-2597 Khazaei, M ; Sharif University of Technology
    Routledge  2020
    Identifying the factors affecting profitability is important from the perspective of market players. One of the most important benchmarks of firm performance is accounting profit and effective factors analysis so that users of accounting information analyse the factors affecting profit, firm performance and various aspects of its performance and according to estimates Done, make your own decision on how to allocate resources. The main purpose of this study is to investigate the impact of some factors of competitiveness, entrepreneurship and business environment indicators on the profitability of the world’s top companies. For this purpose, 176 top companies in the world from 2013 to 2018... 

    Walking in streets with minimal sensing

    , Article Journal of Combinatorial Optimization ; Volume 30, Issue 2 , 2014 , Pages 387-401 ; ISSN: 13826905 Tabatabaei, A ; Ghodsi, M ; Sharif University of Technology
    We consider the problem of walking a robot in an unknown polygon called “street”, starting from a point (Formula presented.) to reach a target (Formula presented.). The robot is assumed to have minimal sensing capability in a way that cannot infer any geometric properties of the environment, such as its coordinates, angles or distances; but it is equipped with a sensor that can only detect the discontinuities in the depth information (or gaps). Our robot can also locate the target point (Formula presented.) as soon as it enters in robot’s visibility region. In addition, one pebble is assumed to be available to the robot to be used as an identifiable point and to mark any position of the... 

    Many to many hub and spoke location routing problem based on the gravity rule

    , Article Uncertain Supply Chain Management ; Volume 6, Issue 4 , 2018 , Pages 393-406 ; 22916822 (ISSN) Khosravi, S ; Akbari Jokar, M. R ; Sharif University of Technology
    Growing Science  2018
    This paper examines the spoke and hub location decisions in a routing problem. To minimize the total cost, the study analyzes on how to locate the spokes, hubs and the allocation of spoke nodes to hub nodes, the routing among the nodes and the number of vehicles assigned to each hub thoroughly. As there might be no facility assigned to some points, unsatisfied demands must be distributed to other nodes with available facilities. Furthermore, the realized demand is determined by considering the perceived utility of each path, using The Gravity rule. For this purpose, the proposed nonlinear model is transformed into a linear programming model, where some tightening rules and preprocessing... 

    Developing a model based on sustainable development for Prioritizing entrepreneurial challenges under a competitive environment

    , Article Journal of Competitiveness ; Volume 13, Issue 3 , 2021 , Pages 73-91 ; 1804171X (ISSN) Khalilsanjani, A ; Saparauskas, J ; Yazdani Chamzini, A ; Turskis, Z ; Feyzbakhsh, A ; Sharif University of Technology
    Tomas Bata University in Zlín  2021
    In the post-recession period, the business environment in developing countries is still relatively undesirable. Based on the reports published, the number of closed entrepreneurs are significantly more than the number of those newly established. These statistics also reflect that the development of entrepreneurship faces several challenges. However, a strategic management program must be accurately conducted to effectively control entrepreneurial challenges based on the limitation of time and financial resources. On the other hand, the program should provide an appropriate opportunity for competitiveness by producing better quality goods and services successfully marketed to consumers. The... 

    Relationship of profitability of world’s top companies with entrepreneurship, competitiveness, and business environment indicators

    , Article Applied Economics ; Volume 53, Issue 23 , 2021 , Pages 2584-2597 ; 00036846 (ISSN) Khazaei, M ; Sharif University of Technology
    Routledge  2021
    Identifying the factors affecting profitability is important from the perspective of market players. One of the most important benchmarks of firm performance is accounting profit and effective factors analysis so that users of accounting information analyse the factors affecting profit, firm performance and various aspects of its performance and according to estimates Done, make your own decision on how to allocate resources. The main purpose of this study is to investigate the impact of some factors of competitiveness, entrepreneurship and business environment indicators on the profitability of the world’s top companies. For this purpose, 176 top companies in the world from 2013 to 2018... 

    The promotion of innovation in regulated network industries

    , Article International Review of Environmental and Resource Economics ; Volume 15, Issue 1-2 , 2021 , Pages 137-174 ; 19321465 (ISSN) Mirnezami, S. R ; Sharif University of Technology
    Now Publishers Inc  2021
    The capital intensive network industries such as electricity and gas delivery infrastructures exhibit natural monopoly characteristics because of their high economy of scale relative to the size of the market. Due to the absence of direct competition in these regulated industries, infrastructure providers hardly undertake the appropriate level of innovation activities to optimise the operation and continuity of their services; a review is provided to show how different countries support innovation in the network industries. As innovation activities are costly and risky undertakings, a relevant query is how to incentivise innovation through economic regulations. This paper models three... 

    Extension of Spatial Competition Model with Raffle

    , M.Sc. Thesis Sharif University of Technology Tahvilian, Mehrdad (Author) ; Kamali, Behrang (Supervisor) ; Vesal, Mohammad (Co-Advisor)
    This research is about raffles held by firms. Nowadays raffles are used by some firms as a mean to attract more customers and obtain more profit to the extent that they compete on their prize instead of their price. In order to investigate this phenomenon, we introduce a model based on spatial competition. This model explains the reason firms have incentive to offer raffles when consumer is risk neutral. According to this model we conclude competing on prize reduces consumers’ surplus considerably. Because of this, the intervention of policy maker can prevent the reduction in consumers’ surplus  

    Analyses of Effect of Bank Branching on Deposit Market Share and Market Size in Iran Banking Industry

    , M.Sc. Thesis Sharif University of Technology Yousefi, Fateme (Author) ; Fatemi, Farshad (Supervisor)
    This thesis aim to the study of the effect of bank’s branching decisions on deposit market. Using panel data banks from Iran, we study effect of branching on market share and market size. In theoretical part, we assume that banks maximize discounted flow of the profits. We also assume that the banks take into account the reaction from rival banks in setting number of branches. Banks are assumed to expect the rival banks react by a lag of one period. In empirical part, in order to distinguish between aggregate market size effect and market share effect, we rewrite quantity of deposit in banks as the product of aggregate deposit and market share. We specify deposit market share function with... 

    An Algorithm for Electricity Pricing Considering Competition Among Energy Suppliers

    , M.Sc. Thesis Sharif University of Technology Gholipour, Faeze (Author) ; Rafiee, Majid (Supervisor) ; Najafi, Mehdi (Supervisor)
    In this study, a smart grid algorithm based on pricing and by considering a model in the electricity market is presenting, which is focused on reducing the cost of production for the supplier as well as increase the utility for the electricity consumer. The algorithm has been also modeling by considering multiple suppliers. The model has been designing by taking the home subscribers in to account and to increase their social welfare. The difference between the following developing model compared to the other ones, which are presented so far, is the consideration of the competition between suppliers and the real-time pricing conditions. In fact, in this model, the price of electricity has... 

    The Relationship Between Common Ownership and Competitive Conditions of Corporations: Evidence from the Iranian Stock Market

    , M.Sc. Thesis Sharif University of Technology Hosseini, Kowsar (Author) ; Ebrahimnejad, Ali (Supervisor)
    The impact of ownership concentration on competitive conditions and profitability of industries has been studied and analyzed for decades. By using the Herfindahl-Hirschman concentration index, a range for the level of concentration in the industry has been determined, and some countries implement anti-trust laws based on this range. The new literature that has been discussed recently is the concentration of the market directly and through the common ownership of corporations by large shareholders. In the sense that two or more apparently independent companies may have a common owner who practically regulates their behavior as a company. The structure of ownership in Iran is complex and... 

    A modified strategy formulation model for management technologies in holding companies: A case study of an Iranian conglomerate

    , Article International Journal of Technology Intelligence and Planning ; Volume 9, Issue 1 , 2013 , Pages 57-73 ; 17402832 (ISSN) Moghaddam, N. B ; Nedaei, H ; Sahafzadeh, M ; Hosseini, S. H ; Sharif University of Technology
    Management Technologies Strategy formulation (MTS formulation) in holding companies is carried out with the aim of achieving competitive advantages in the market and fulfilment of strategic goals of the corporation. This paper presents a modified technology strategy formulation model for MTS in holding companies. Prior to present an integrated model of MTS formulation, a number of technology strategy formulation models are analysed and their suitability for the headquarter of a holding company is discussed. Through a case study research method, the paper documents how MTS formulation was implemented in an Iranian conglomerate tasked with managing diversified subsidiaries. We concluded that... 

    Parallel importation and price competition in a duopoly supply chain

    , Article International Journal of Production Research ; Volume 53, Issue 10 , 2015 , Pages 3104-3119 ; 00207543 (ISSN) Shavandi, H ; Valizadeh Khaki, S ; Khedmati, M ; Sharif University of Technology
    Taylor and Francis Ltd  2015
    Nowadays, diversion of products distribution from authorised channels to the gray markets is one of the main challenges of manufacturers. Suppose an international supplier distributes the products in several countries with different prices. In parallel importation, there are unauthorised distributers who supply products with a lower price and import them to a higher price market. The problem of parallel importation considering a manufacturer and a competitor is analysed using the game theory approach in this article. We investigate the pricing strategy for manufacturers and the effect of unauthorised distributer on price, market share and profit. We also investigate the performance of... 

    A study of employees' views of strategic information systems in Iranian banks: The case of internet banking

    , Article International Journal of Information and Communication Technology ; Volume 7, Issue 1 , 2015 , Pages 52-72 ; 14666642 (ISSN) Farzaneh, M ; Najafloo, F ; Rasouli, H ; Sharif University of Technology
    Inderscience Enterprises Ltd  2015
    Internet banking is a tool to achieve competitive advantage and its usage has been spreading rapidly in recent years. This paper strives to identify a comprehensive study of the major internet banking quality measurements, which covers a wide range of literature relevant to international papers and scholars and then evaluate them through using a precise method, Shannon entropy. At the last stage the validated criteria were exploited to survey in Iranian banks. The empirical research consists of a quantitative study of internet banking by a sample of employees in two banks of Iran. In this regard, the raised question is about whether or not the internet banking is a strategic information... 

    On quota violations of OPEC members

    , Article Energy Economics ; Volume 68 , 2017 , Pages 410-422 ; 01409883 (ISSN) Ghoddusi, H ; Nili, M ; Rastad, M ; Sharif University of Technology
    Over the last decades quota violations have become a norm for OPEC countries. However, the academic literature on OPEC focuses more on its production behavior than on analyzing the quota allocation process or characterizing quota violation patterns. This paper offers a theoretical model with empirical evidence to explain OPEC members’ incentives for abiding or violating quotas. We first offer a cartel model with a quota allocation rule and an endogenous capacity choice. The model highlights the trade-off between building spare capacity to bargain for a higher legitimate quota versus risking quota violation punishment. Using the quarterly data from 1995 to 2007, we empirically support the... 

    Operational risk evaluation in competitive electricity market scheduling

    , Article 2006 International Conference on Power System Technology, POWERCON2006, Chongqing, 22 October 2006 through 26 October 2006 ; 2006 ; 1424401119 (ISBN); 9781424401116 (ISBN) Ehsani, A ; Ranjbar, A. M ; Fotuhi Firuzabad, M ; Samani, S. C ; Mozafari, B ; Sharif University of Technology
    Institute of Electrical and Electronics Engineers Inc  2006
    Electric power systems are typically operated at least cost subject to technical and reliability constraints. This paper presents a probabilistic approach for risk evaluation in competitive electricity market scheduling. A competitive structure is proposed which includes a purchasing agency with centrally optimized scheduling (MaxISO structure). Spinning and non-spinning reserves are considered in the proposed approach. The value of unit commitment risk is deduced from the generation model. The required generation model is constructed using the outage replacement rate (ORR) of units. The load forecast uncertainty is included in operational risk evaluation. This is due to the increased... 

    Price competition in duopoly supply chains with stochastic demand [electronic resource]

    , Article Journal Of Manufacturing Systems ; 01/2014 Mahmoodi, A. (Anvar) ; Eshghi, Kourosh ; Sharif University of Technology
    In the literature, substantial researches have been carried out on supply chain coordination. The majority of these studies suggest a mechanism that enforces the supply chain members to follow the strategies that produce the equilibrium of an integrated supply chain. Moreover, most of researches do not consider the competition among supply chains  

    Latecomer systems integration capability in complex capital goods: The case of Iran's electricity generation systems

    , Article Industrial and Corporate Change ; Vol. 23, issue. 3 , 2014 , pp. 689-716 ; ISSN: 09606491 Kiamehr, M ; Hobday, M ; Kermanshahy, A ; Sharif University of Technology
    This article introduces the concept of latecomer systems integration capability (LSIC) as a construct for theory development in the area of emergence and competitiveness of producers of complex capital goods from developing economies. The study draws on three bodies of the literature to conceptualize LSIC and then presents an in-depth case study of the development of LSIC in a major Iranian firm engaged in producing electricity generation systems. Although an exploratory study, the findings suggest that, in this case, LSIC evolved in a fairly short period of time from simple low-cost project management skills to innovative capabilities, supported by some sophisticated engineering and design... 

    Exploration of process and competitive factors of entrepreneurship in digital space: A multiple case study in Iran

    , Article Education, Business and Society: Contemporary Middle Eastern Issues ; Volume 4, Issue 4 , 2011 , Pages 267-279 ; 17537983 (ISSN) Hafezieh, N ; Akhavan, P ; Eshraghian, F ; Sharif University of Technology
    Purpose: The purpose of this paper is to explore the process and competitive factors of entrepreneurship in digital space in Iran. Design/methodology/approach: In the last decades, the development and advancement of information and communication technologies (ICTs) and the business innovations related to them have defined a new economy which is known as "digital economy". Establishing and running businesses in this digital space means carrying out a kind of electronic commerce by exploiting the internet and other electronic networks. The new digital economy provides exceptional opportunities for many entrepreneurs to create new ventures in different business areas according to electronic... 

    A multi-operator Imperialist Competitive Algorithm for solving Non-Convex Economic Dispatch problem

    , Article Indian Journal of Science and Technology ; Volume 9, Issue 6 , 2016 ; 09746846 (ISSN) Eghbalpour, H ; Nabati Rad, M ; Hassani, R ; Sharif University of Technology
    Indian Society for Education and Environment 
    Non-Convex Economic Dispatch (NED) has been addressed as an open and demanding optimization problem in power systems. Due to the fact that realistic ED problems have non-convex cost functions with equality and inequality constraints, conventional search methods are unable to effectively find the global solution. In recent years, because of their great potential to achieve optimal or close-to-optimal solution, meta-heuristic optimization techniques have attracted significant attention to tackle the complexity of NED problems. In this paper, an efficient approach is proposed based on Imperialist Competitive Algorithm (ICA). The proposed algorithm named multi-operator ICA (MuICA) merges the...